| Goldline Storage and Fulfilment Ltd | Transport & logistics | 2018 |
| Goldseal Conservatories Limited | Construction | 2007 |
| Goldstar Maintenance Ltd | Construction | 2011 |
| Goldwater Financial Ltd | Financial services | 2023 |
| Gollins Contractors Limited | Agriculture & fishing | 1987 |
| Gonty Ltd | Transport & logistics | 2019 |
| Good AS Gold Childminding Services Ltd | Health & social care | 2020 |
| Good Choice Services Ltd | Financial services | 2018 |
| Good Deal Vans Ltd | Wholesale & retail | 2025 |
| Good EGG Network Ltd | Arts & recreation | 2015 |
| Good Fabrications Limited | Manufacturing | 1983 |
| Goodband Consultancy Limited | Professional & scientific | 2006 |
| Goode and Goode Holdings Limited | Real estate | 2017 |
| Goodline Ltd | Wholesale & retail | 2021 |
| Goodsons Farm Vets Ltd | Professional & scientific | 2022 |
| Goosed Ltd | Wholesale & retail | 2026 |
| Gordon Cooper Associates Limited | Administrative & support | 2002 |
| Gordon Kentra Ltd | Professional & scientific | 2026 |
| Gorilla Cloud Services Ltd | Information & communication | 2020 |
| Gorley Tuition Ltd | Education | 2018 |
| Goss Environmental Coatings Limited | Construction | 1988 |
| Goss Specialist Services Limited | Extraterritorial | 2011 |
| GOT Talent Events Ltd | Arts & recreation | 2018 |
| GOT YOU Cover Limited | Administrative & support | 2025 |
| Goto Property Ltd | Real estate | 2024 |
| Gourmet Dog Nutrition Ltd | Other services | 2016 |
| Govern to Thrive Ltd | Professional & scientific | 2026 |
| Gowers Limited | Professional & scientific | 2001 |
| GP Services (Milton Keynes) Limited | Construction | 2006 |
| GPG (Aylesbury) Limited | Professional & scientific | 2014 |
| GPR Pro Exterior Cleaning Services Limited | Administrative & support | 2024 |
| GR8 Management Ltd | Real estate | 2021 |
| Grace & Co. Ltd | Administrative & support | 2021 |
| Grace & Panashe Solutions Ltd | Manufacturing | 2025 |
| Gracewaya Limited | Health & social care | 2014 |
| Gracie Barra Tooting Broadway Limited | Extraterritorial | 2023 |
| Gradan Group Limited | Hospitality | 2024 |
| Grafter Group Limited | Financial services | 2022 |
| Grafter Services Limited | Manufacturing | 2024 |
| Graham James LEE Ltd | Other services | 2010 |
| Granahan Mccourt London Limited | Information & communication | 2018 |
| Grand International Decor Ltd | Other services | 2011 |
| Grandma’S Hot Sauce Limited | Manufacturing | 2020 |
| Grands Vins DE France Limited | Wholesale & retail | 2008 |
| Grandstern Limited | Wholesale & retail | 2013 |
| Grange Farm Community Holdings Ltd | Households | 2025 |
| Granson Properties Limited | Real estate | 2024 |
| Grant Chanters Equine Training & Bitting Services Limited | Professional & scientific | 2007 |
| Grants Academy Ltd | Information & communication | 2024 |
| Gravelmoor Limited | Real estate | 2002 |
| Gravern Properties Limited | Real estate | 1963 |
| Gray Wolf Limited | Professional & scientific | 2019 |
| Great 3 Consulting Ltd | Extraterritorial | 2022 |
| Great Angel Shipping Limited | Transport & logistics | 2010 |
| Great Benefit Limited | Information & communication | 2001 |
| Greater London Glazing Ltd | Construction | 2019 |
| Green Anaesthetic Limited | Health & social care | 2010 |
| Green Beret Coffee Company Ltd | Other services | 2017 |
| Green Disc Logistics Limited | Manufacturing | 2020 |
| Green Energy Storage 140 Limited | Energy | 2023 |
| Green Finger Gardens Ltd | Administrative & support | 2014 |
| Green Flight 247 Ltd | Administrative & support | 2018 |
| Green FOX Flowers UK Ltd | Agriculture & fishing | 2026 |
| Green House Entertainment Ltd | Arts & recreation | 2025 |
| Green Hydrogen Solar Farm Limited | Construction | 2022 |
| Green Lawn Garden Maintenance Limited | Construction | 2025 |
| Green Link Solution Ltd | Wholesale & retail | 2023 |
| Green Retreats Holdings Limited | Financial services | 2020 |
| Green Retreats Limited | Construction | 2012 |
| Green Vine Ltd | Professional & scientific | 2025 |
| Greenage Cleaning Services Ltd | Administrative & support | 2026 |
| Greenfield Entertainment Limited | Arts & recreation | 2025 |
| Greenford Renewables Ltd | Construction | 2022 |
| Greenhaven Conservation Limited | Arts & recreation | 2024 |
| Greenhill House Residents Management Company Limited | Households | 2008 |
| Greenleaf Surgical Limited | Health & social care | 2021 |
| Greenridge Property Maintenance Limited | Construction | 2025 |
| Greetingsworld (UK) Ltd | Wholesale & retail | 2020 |
| Grendon Computers Ltd | Other services | 2021 |
| Grendon Convenience Stores Ltd | Wholesale & retail | 2024 |
| Grendon Stores Ltd | Wholesale & retail | 2024 |
| Grenville Commercial Limited | Construction | 2019 |
| Grenville Residential Limited | Households | 2019 |
| Grey Rabbit Cakes Limited | Hospitality | 2016 |
| Grey Swan Imports Ltd | Wholesale & retail | 2018 |
| Greyhairworks Ltd | Administrative & support | 2015 |
| Greyhound Optical Limited | Wholesale & retail | 2005 |
| Greyline Services Ltd | Transport & logistics | 2011 |
| Greyspiders Limited | Professional & scientific | 2012 |
| Greyton (Banbury) Limited | Administrative & support | 2013 |
| Greyv Ltd | Administrative & support | 2020 |
| Grid Property Group Limited | Real estate | 2021 |
| Gridnest Limited | Wholesale & retail | 2025 |
| Gridnev Arts Limited | Arts & recreation | 2001 |
| Grierson Coaching and Consulting Ltd | Professional & scientific | 2024 |
| Griffin & Sons (Landscaping) Ltd | Administrative & support | 2019 |
| Griffiths Family Property Investments Ltd | Real estate | 2024 |
| Grill Box & Curry's Ltd | Hospitality | 2023 |
| Groguse Ltd | Construction | 2025 |
| Groove Grid Ltd | Wholesale & retail | 2023 |